Gotchas

Surprising behavior in Rails, Ruby, and the gems around them -- what breaks, why, and how to work around it.

EncryptedConfiguration#key? Missing Before Rails 7.1

delegate_missing_to turns a missing predicate into a confusing ArgumentError, not a NoMethodError.

rails ruby gotchas

Requiring an ActiveSupport Leaf File Breaks on Rails 7.1

require 'active_support/x' alone raises a deprecator NoMethodError unless the parent library loads first.

rails ruby gotchas